well...leaving it on banks is much safer than on bitcoins at its present situation but that's also true that banks don't pay enought intrest rate as we are getting in bitcoins.. so I will just advice invest on banks only

leaving in banks doing nothing is not an option for me considering interest rate is way utterly too low. Rather than leaving it idle and doing nothing, I would probably diversify my holding to stocks and the rest into bitcoin. At least if one of it drops, there's a good chance the other will pick up.

Just looking for some opinions. I know I can make 0.5% on my cash in the bank so I'm thinking to put a small percentage into buy and hold of bitcoins.

What do people think of this as an investment holding for 6 months, 1 year or 5 years?

If you are planning to hold for five years then this would be a good investement probably better then putting your money ini the bank , even if it's for one year it should be good since the halving block reward will happen 11 months from now , price should increase sooner or later but 5 years is a better option since there would be 2 halving blocks (the one 2016 and the other on 2020 I believe) Read this article aswell to get more info for how the halving will affect the price : http://www.newsbtc.com/2015/03/13/how-will-2017s-block-reward-halving-affect-bitcoin-price/

Having a lot of money in a bank account that pay low interest is not an investment. It is just a placeholder to avoid loosing your funds.

If you have enough money to invest you should look for severl options since it is a bad idea to put all your eggs in one basket.

With bitcoin there is only one sure thing and that is that nobody know what will happen to the value. Historicaly there is very few investments in the past two years that has been worse than bitcoin but that does not tell anything about the future.

Just looking for some opinions. I know I can make 0.5% on my cash in the bank so I'm thinking to put a small percentage into buy and hold of bitcoins.

What do people think of this as an investment holding for 6 months, 1 year or 5 years?

0.5% per year? you are not even beating inflation. Probably best to diversify buy some bitcoin/litecoin and do something else with the rest, i have most of my savings working for me in some way because i got fed up with the crappy bank rates.

well...leaving it on banks is much safer than on bitcoins at its present situation but that's also true that banks don't pay enought intrest rate as we are getting in bitcoins.. so I will just advice invest on banks only

Is it? Depends on what country you're in. Places like Greece aren't doing so well. Because of deflation and the cost of living going up you actually lose money keeping it in a bank every year so bitcoin could be much safer. You could just sell a little b it everytime it rises then buy back when it falls if you wanted to make money that way.

Bitcoin will hit $500 easily next year, you are practically guaranteed to double your money if you buy now.

Lol. If it was that easy we wouldn't be at $230 right now. I assume you already bought a huge load of coins to sell at $500?

Really? After the last bubble we had it isn't unusual to go through such a long bear phase. After the bubble from $30 down to 2 cents it took the market 24 months to recover from that. The same pattern we are seing now. So no surprise to me.After this debate and the coming halving many unexpected things can happen. Positive as also negative.

IMO, the supply is still outpacing the demand by a large margin. The bulk "SELL" deals in some of the exchanges, sometimes involving thousands of coins is a proof for this (during the past 2-3 months, I have noticed several of such deals in BTC-e). I believe that the exchange rate will continue to go down for at least another year.

Bitcoin will hit $500 easily next year, you are practically guaranteed to double your money if you buy now.

Lol. If it was that easy we wouldn't be at $230 right now. I assume you already bought a huge load of coins to sell at $500?

No market prediction is ever easy. Still, I think the chances are good that Bitcoin will be significantly higher in twelve months from now because of the halving and more certainty because the blocksize debate is already starting to resolve as miners are voting.

You should wait until the Blockstream/XT battle has finished before making any serious investment decisions. I do not think we have reached the bottom price from that situation yet. You may be able to get some coin for a lot cheaper.